Quality of the spare triple-GEM detectors

Triple-GEM chambers equip the inner region of the M1 muon station. In order to provide spare detectors in case of problems in the operating ones, new chambers have been assembled at the Frascati National Laboratories of the INFN. This note summarizes the results of the quality tests performed at the end of the production procedure. Document Status Sheet 1. Document Title: Quality of the spare triple-GEM detectors 2. Document Reference Number: LHCb-PUB-2017-21 3. Issue 4. Revision 5. Date 6. Reason for change Draft 1 October 15, 2017 First version Final 1 October 30, 2017 Checked english